see members of group linux code example
Example 1: check which users are part of a group linux
grep 'group-name-here' /etc/group
Example 2: how to check user in group linux
# to see the group joined by current user
$ id
groups
groups {USERNAME}
groups vivek
Example 3: linux list user group
groups [user name]
# [user name] : (optionnal) the user to list the group of
# default is the one executing the command.